The Mark Family Photo Album

Mark I accelerator: This historic photo, taken
in about 1946, shows W.W. Hansen and three students
carrying one of the first linear electron
accelerator sections ever built at Stanford. We are
indebted to Karl Brown for preserving this
photograph. (SLAC slide 3)

Mark II accelerator: Karl Brown at the klystron
controls for the Mark II in 1949 or 1950. (arc490)

Mark IV accelerator: The Mark IV was designed as
a vehicle for improving accelerator components, but
was also used at times for beta-ray cancer therapy.
(M938)

Mark I detector: The Mark I
Detector at SPEAR in 1978, with Roy Schwitters
standing near its axis. This detector was used by
the SLAC-LBL Collaboration to discover many new
subatomic particles. (LBNL photo, GA4806, SLAC slide
784)

Mark II detector: The Mark II detector at IR12
after the move from SPEAR to PEP. (Faust 428)